Find the y-intercept for: 8x - y = 1
and: x - 2y = -15
and: 11x + 8y = -56

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88

What is the value of x when x + 7 = 21?